A fifty-meter-high space crack appears in Shanghai, and the other end is connected to the Xuanxing fifty light-years away.
Li Xiaobai lived near the crack and first discovered a strange energy that could be observed and calibrated from the distorted equipment records.
Cross-border plants, creatures and the escalating urban crisis have led him from a bystander to a crack response team.
When humans stepped into Xuanxing, Li Xiaobai discovered that there were not only beasts on the other side of the crack, but also intelligent civilizations who were also making choices for the future. The resources, technology and survival of the two worlds are gradually intertwined, and he can only find the possibility of coexistence after losing them again and again.
